Fits in old Hydrobak pack5I have an old Hydrobak that I use for cycling. The old reservoir in that started leaking because the o-ring cracked. I was worried about whether this new style reservoir would fit in my old pack. The new ones look a bit wider. But it fits fine, and has lots of good additional features!

0 of 0 found this review helpful.Was this review helpful to you? Yes / No